<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">

    </div>
    <script src="./src/react.js"></script>
    <script src="./src//react-dom.js"></script>
    <script src="./src/babel.js"></script>

    <script type="text/babel">
        let h1Dom = <h1>hello world </h1>
        ReactDOM.render(
            h1Dom,
            document.getElementById('app')
        )
    </script>
</body>

</html>